Some measurements for its efficiency in a room with 19°C / ~60-65% humidity.

In continuous mode, alternating 2 and a half hours on low speed and 2 and a half hours on high speed:
1st 30 minutes (high fan speed): ~210ml - consumption around 215w/hr.
2nd 30 minutes (low fan speed): ~185ml - consumption around 225w/hr.
3rd 30 minutes (high fan speed): ~220ml - consumption around 215w/hr.
4th 30 minutes (low fan speed): ~170ml - consumption around 225w/hr.

In the caps, one hour on DRY mode - 175ml - consumption around 750w/hr.

Conclusion: It performs better on high fan speed, producing around 2lt/kwh, which is very good for the current era where every kWh counts.

As for the negatives, the plastic parts smell (it's new). Let's see when it will lose the smell. The sound on fan speed 2 is not silent but not particularly bothersome. On speed 1, it is much more civilized but the efficiency drops by around 15-20%.

Update after 6 months: It continues to perform very well, but it never lost the smell... it always needs about 10-20 minutes with an open window to remove the odor before I put it in the room. Also, there is some resonance/vibration with the compressor and a plastic part if I put a weight of around 3-4kg on the top plastic.

Beast.
From noise, it can be heard on level 2, on level 1 it's okay.
The only thing is that recently, it has done the following 3 times (that I noticed):
While I closed it, after some time (around 10 to 30 minutes), it opened by itself again!
If it continues, I will talk to the inventor and I will come back.

Update 1/7/22: I have the impression, after observation, that if you set the timer on the dehumidifier, for example, to work for 3 hours and you go and turn it off earlier, it does this strange thing where it turns on by itself again after a while. I will check it again in the autumn.

11/2023
The machine is a beast, I have no words.
In automatic mode, it consumes about 220 watts.
Be very careful, in smart mode for clothes, it increases consumption vertically, about 750 to 800 watts.
I hang the clothes in a room, set it to automatic at 40% and they dry perfectly and economically.
I think the noise is fine, considering its volume and power.

4/2024 and it remains a beast. It collects ALL the water.
Performance remains the same. I regularly clean the filter. I also opened the back cover and did a biological cleaning myself on the element.
It was a bit dirty, I expected a much worse condition. I am very satisfied with the machine.
Also, in continuation of the above observation, when you set the timer and go and turn off the machine from off, after a while it opens and works.
This has only happened to me when I have set the timer.